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  Date: 2021/10/26
  Time: 14:26
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>观察pageContext和request作用域有何区别</h1>
<%="page范围中的信息："+pageContext.getAttribute("userName")%>
<%="request范围中的信息："+request.getAttribute("userName")%>
</body>
</html>
